Reactor for implementing chemical reactions involving a biomass

Abstract

A reactor comprises a cylindrical body (1) with a lower cylindrical portion (5) and an upper cylindrical portion (6) of greater diameter than the lower portion, mutually connected by a connecting ring (7), a filtering ring (2) arranged in the lower part of the upper portion (6) and supported by the connecting ring (7), and an inner cylindrical member (3) having, at the lower end thereof, a flange (8) bearing on the filtering ring (7) and providing a gap (9) between the outer periphery of the flange (8) and the inner wall of the upper portion (6), wherein all the rotary elements are coaxially disposed.

Claims

1. A reactor for the implementation of chemical reactions involving a biomass and a reaction liquid, wherein the said reactor comprises:

(1) a cylindrical body (1) including a cylindrical lower portion (5) and an upper cylindrical portion (6), which is coaxial with said upper portion and whose diameter is larger than that of the lower portion, joined to each other by a connection ring (7);

(2) a filtration ring (2) located in the lower part of the upper portion (6) and resting on the connecting ring (7); and

(3) an inner cylindrical component (3) which is coaxial with the cylindrical body (1) and which has, at its lower extremity, a flange (8) which rests on the filtration ring (2) and forms a free space (9) between the outer periphery of the flange (8) and the inner wall of the upper portion (6).

2. A reactor according to claim 1, comprising means for centering the inner cylindrical component (3), which includes a centering ring (11) located inside the upper portion (6) and force-fitted between the outer wall of the inner cylindrical component (3) and the inner wall of the said upper portion (6).

3. A reactor according to claim 2, further comprising means (14) (15) (16) for supplying the reaction liquid and means (12) for sampling the filtered liquid contained within the space located between the upper cylinder (6) and the inner cylindrical component (3).

4. A reactor according to claim 3, further comprising stirring means located in the lower portion (5).

5. A reactor according to claim 4, wherein the stirring means include means (4) (13) for the introduction of a gas.

6. A reactor according to claim 5, wherein said means for the introduction of a gas are adapted to create a rising current of gas bubbles located near the axis of the tubular body (2).

7. A device for the implementation of two consecutive reactions, each of which involving a biomass, wherein said device comprises two reactors according to claim 3, wherein the reaction-liquid supply means of the second reactor (14b) are connected to the sampling means (12) for the filtered liquid contained in the upper portion of the first reactor.

8. A reactor according to claim 1, wherein the dimensions of the filtration ring are such that said ring is fitted externally against the inner wall of the upper portion (6) and its inner contour is offset in relation to the lower portion (5), and wherein the cylindrical part of the inner cylindrical component (3) is offset in relation to the filtration ring (2).